basic-diagnostic.md

# RUN: nixd --lit-test < %s | FileCheck %s

--> initialize(0)

```json
{
   "jsonrpc":"2.0",
   "id":0,
   "method":"initialize",
   "params":{
      "processId":123,
      "rootPath":"",
      "capabilities":{
      },
      "trace":"off"
   }
}
```

<-- textDocument/didOpen

```json
{
   "jsonrpc":"2.0",
   "method":"textDocument/didOpen",
   "params":{
      "textDocument":{
         "uri":"file:///basic.nix",
         "languageId":"nix",
         "version":1,
         "text":"let x = 1; in x"
      }
   }
}
```

Expected no diagnostics for this file:

```
     CHECK:   "method": "textDocument/publishDiagnostics",
CHECK-NEXT:   "params": {
CHECK-NEXT:     "diagnostics": [],
CHECK-NEXT:     "uri": "file:///basic.nix",
CHECK-NEXT:     "version": 1
CHECK-NEXT:   }
CHECK-NEXT: }
```

<-- textDocument/didOpen

```json
{
   "jsonrpc":"2.0",
   "method":"textDocument/didOpen",
   "params":{
      "textDocument":{
         "uri":"file:///basic.nix",
         "languageId":"nix",
         "version":1,
         "text":"what ? x not parsed!"
      }
   }
}
```

```
     CHECK: "method": "textDocument/publishDiagnostics",
CHECK-NEXT:   "params": {
CHECK-NEXT:     "diagnostics": [
CHECK-NEXT:       {
CHECK-NEXT:         "message": "syntax error, unexpected ID, expecting end of file",
CHECK-NEXT:         "range": {
CHECK-NEXT:           "end": {
CHECK-NEXT:             "character": 9,
CHECK-NEXT:             "line": 0
CHECK-NEXT:           },
CHECK-NEXT:           "start": {
CHECK-NEXT:             "character": 9,
CHECK-NEXT:             "line": 0
CHECK-NEXT:           }
CHECK-NEXT:         },
CHECK-NEXT:         "severity": 1
CHECK-NEXT:       }
CHECK-NEXT:     ],
CHECK-NEXT:     "uri": "file:///basic.nix",
CHECK-NEXT:     "version": 1
CHECK-NEXT:   }
CHECK-NEXT: }
```

Then, check that we do eval the file. Nix files are legal expressions, and should be evaluable.


```json
{
   "jsonrpc":"2.0",
   "method":"textDocument/didOpen",
   "params":{
      "textDocument":{
         "uri":"file:///test-eval.nix",
         "languageId":"nix",
         "version":1,
         "text":"let x = 1; in y"
      }
   }
}
```

```
     CHECK: "diagnostics": [
CHECK-NEXT:       {
CHECK-NEXT:         "message": "undefined variable 'y'",
CHECK-NEXT:         "range": {
CHECK-NEXT:           "end": {
CHECK-NEXT:             "character": 14,
CHECK-NEXT:             "line": 0
CHECK-NEXT:           },
CHECK-NEXT:           "start": {
CHECK-NEXT:             "character": 14,
CHECK-NEXT:             "line": 0
CHECK-NEXT:           }
CHECK-NEXT:         },
CHECK-NEXT:         "severity": 1
CHECK-NEXT:       }
CHECK-NEXT:     ],
```

Check that we handle relative paths corretly. Introduce `importee.nix` and `importor.nix` in our workspace, and test whether `importor.nix` can **import** `importee.nix`.

```json
{
   "jsonrpc":"2.0",
   "method":"textDocument/didOpen",
   "params":{
      "textDocument":{
         "uri":"file:///importee.nix",
         "languageId":"nix",
         "version":1,
         "text":"{a, b}: a + b"
      }
   }
}
```

```json
{
   "jsonrpc":"2.0",
   "method":"textDocument/didOpen",
   "params":{
      "textDocument":{
         "uri":"file:///importor.nix",
         "languageId":"nix",
         "version":1,
         "text":"import ./importee.nix { a = 1; }"
      }
   }
}
```
Currently, nix does not support in-memory filesystems, so this will fail.

```
CHECK: "message": "getting status of '/importee.nix': No such file or directory",
```



```json
{"jsonrpc":"2.0","method":"exit"}
```